@Sebastian Awesome, thanks! Really nice to see that it finds all your tests and is fast. But … I now realize I forgot to say something. When I tested my branch on the test suite at work (which uses tests/) I also got several seconds better times, but then realized I wasn’t using the latest elm-test to begin with. So I updated to elm-test@0.19.1-revision4 and then speed difference shrunk to 0.5 seconds (still a win though!).
If you also have the energy to compare times for elm-test src/ (no globs, let elm-test figure out where the tests are) that would be awesome! I suspect very few people actually do that, but my PR should be as fast as elm-test@0.19.1-revision4 or a tiny bit slower (this depends on how much elm-test decides to parallelize…).